CN103512768B - A kind of monitoring system of Fossil-fired Unit Performance and method - Google Patents

Abstract

Embodiments provide a kind of monitoring system and method for Fossil-fired Unit Performance, comprising: wireless acquisition device, treating apparatus and switching device; Described wireless acquisition device connects fired power generating unit bootstrap system, for gathering the unit operation parameter of fired power generating unit bootstrap system; Described unit operation parameter comprises: drive vapor pressure, condensate water pressure, condensing water flow be sent to treating apparatus; Described treating apparatus obtains the performance of net coal consumption rate and described fired power generating unit after setting up the set of eigenvectors in described fired power generating unit between energy consumption characteristics and unit operation parameter; Described switching device connects described treating apparatus, and the performance for the described fired power generating unit obtained according to described treating apparatus carries out switching.By adopting wireless acquisition device to carry out in real time data and to gather accurately, for dissimilar unit, the performance of fired power generating unit under different operating mode can be determined, reasonably arranging to run and dropping into and excision.

Description

A kind of monitoring system of Fossil-fired Unit Performance and method

Technical field

The present invention relates to field of thermal power, specifically a kind of monitoring system of Fossil-fired Unit Performance and method.

Background technology

Along with the aggravation of worldwide energy scarcity and market competition, energy-saving and cost-reducing oneself becomes the main target that work in every is carried out in Utilities Electric Co. of various countries and power station.As far back as the initial stage eighties, the U.S. EPRI coal-burning power plant all to the whole America has carried out comprehensively investigating and research, thinks that the research on adjustment of unit operation mode has comparatively considerable energy-saving potential.

Economize energy, reduces energy consumption, is the long-term fundamental state policy of of China equally.Power plant consumes primary energy and produces the big power consumer of secondary energy, and the annual coal amount consumed accounts for 1/2nd of national coal production, and even more, therefore power industry is energy-conservation, especially power plant for energy conservation work carry out significant.Along with going deep into further of electric utility reform, electric power enterprise must in the face of the test of more severe market.The implementation of series of measures such as " to separate the factory and network; surf the Net at a competitive price ", force each electric power enterprise from number one, multi-angle considers how conscientiously to reduce power plant's operating cost profoundly, extend serviceable life of unit and time between overhauls(TBO), safety and economic operation, realize modern management.Thus realize the sustainable development promoting China's power industry, meet the demand of economic development to electric power, ensure stable, the sufficient supplies of electric power, set up resource-conserving, environmentally friendly power industry.Along with the increase gradually of energy-saving and cost-reducing pressure, electricity power enterprise must development of latent energy-saving potential in all its bearings.

At present, the major way of electricity power enterprise's UTILIZATION OF VESIDUAL HEAT IN has residual heat from boiler fume recycle and utilize absorption heat pump to carry out UTILIZATION OF VESIDUAL HEAT IN etc., and this is all the effective means improving unit cycle efficieny, thus as promoting one of conservation measures that electricity power enterprise raises the efficiency.

Fume afterheat recycling is from since the fifties in last century, 6.0 ~ 1000MW grade station boiler has carried out exploring widely, achieve certain achievement, but the larger gap of existence compared with external advanced design, since the nineties in last century, the country such as Russian, German is according to the change of energy prices and environmental requirement, and exhaust gas temperature design load is reduced to 100 DEG C, and in new-built unit or old Transformation of Unit, obtain engineering verification, net coal consumption rate decline 6 ~ 7g/kWh.According to the principle of energy level and systems engineering, current a kind of degree of depth recovery boiler smoke exhaust heat improves the system of unit cycle efficieny, as shown in Figure 1, this system is made up of four parts: flue gas degree of depth cooling unit 11, air heat front preheating process device unit 12, bypass high-pressure feed water unit 13 and bypass high pressure condensate water unit 14.After electric precipitator, cigarette temperature 125 DEG C is cooled to 90 DEG C by the gas cooler degree of depth, and reclaim heat and pass to hot water matchmaker 15, hot water matchmaker transfers heat to air by air heat front preheating process device unit 12, and air themperature rises to 60 DEG C by 20 DEG C; Bypass flue draws 380 DEG C of high temperature flue-gas from boiler heated feed waters and the condensate water of 19% after economizer 16, and boiler smoke temperature is cooled to 125 DEG C.

Another kind of bootstrap system is then adopt absorption heat pump to reclaim recirculated water heat, as shown in Figure 2, using recirculated cooling water as low-temperature heat source, draw gas as driving heat source using 0.35MPa, backwater can be heated to about 50 ~ 80 DEG C by heating heat exchangers for district heating, recirculated cooling water goes condenser to recycle as cold medium after reducing again, improves full factory thermal source and utilizes.The lithium bromide absorption type heat pump that bootstrap system adopts has larger power savings advantages, and heat pump Energy Efficiency Ratio COP is generally about 1.65 ~ 1.85.Heat supply network major network water return pipeline is heated up by absorption heat pump, thermal source utilize Steam Turbine to draw gas with closed cycle coolant-temperature gage (namely recirculated water enters condenser again after absorption heat pump heat release.55 DEG C of backwater are risen to 75 DEG C by absorption heat pump by heat supply network major network backwater, then enter unit heat exchangers for district heating, and 75 DEG C of backwater are heated to 111.6 DEG C, then rise to 135 DEG C of supply heat user by peak load calorifier by 111.6 DEG C.

The feature of these bootstrap systems above-mentioned is all improve energy utilization rate, but have also been changed the whole therrmodynamic system of steam turbine simultaneously, and makes system more complicated, thus makes the energy consumption index of on-line monitoring unit more be difficult to realize.

Summary of the invention

The embodiment of the present invention provides a kind of monitoring system and method for Fossil-fired Unit Performance, for solving therrmodynamic system complex structure in prior art, thus makes the energy consumption index of on-line monitoring unit more be difficult to realize.

A kind of monitoring system of Fossil-fired Unit Performance in the embodiment of the present invention, described monitoring system comprises:

Wireless acquisition device, treating apparatus and switching device;

Described wireless acquisition device connects fired power generating unit bootstrap system, for gathering the unit operation parameter of fired power generating unit bootstrap system; Described unit operation parameter comprises: drive vapor pressure, condensate water pressure, condensing water flow be sent to treating apparatus;

Described treating apparatus obtains the performance of net coal consumption rate and described fired power generating unit after setting up the set of eigenvectors in described fired power generating unit between energy consumption characteristics and unit operation parameter;

Described switching device connects described treating apparatus, and the performance for the described fired power generating unit obtained according to described treating apparatus carries out switching.

The monitoring system of above-mentioned Fossil-fired Unit Performance, wherein, described wireless acquisition device also comprises:

Transmitter, for gathering described unit operation parameter and being sent to terminal groove;

Terminal groove, connects transmitter and measuring resistance, for changing the mode of operation signal of described wireless acquisition device in gatherer process;

Measuring resistance, for converting the current signal of described unit operation parameter to voltage signal;

Voltage measurement parts, are connected with described measuring resistance, for measuring the magnitude of voltage of described voltage signal;

Central processing unit, is connected with described voltage measurement parts, for the unit operation parameter of described voltage signal is added markers, and dissimilar unit operation parameter is stored respectively;

Wireless transmission component, is connected with described central processing unit, gives described treating apparatus for the Signal transmissions that exported by central processing unit.

The monitoring system of above-mentioned Fossil-fired Unit Performance, wherein, described central processing unit also processes according to different ranges for the magnitude of voltage of the unit operation parameter measured by described voltage measurement parts, the voltage data that final output is corresponding with described unit operation parameter.

The embodiment of the present invention also provides a kind of monitoring method of Fossil-fired Unit Performance, and wherein, described method comprises:

The unit operation parameter of fired power generating unit bootstrap system is gathered by wireless acquisition device; Described unit operation parameter comprises: drive vapor pressure, condensate water pressure, condensing water flow;

Set up the set of eigenvectors between energy consumption characteristics and unit operation parameter in described fired power generating unit; Set of eigenvectors between described energy consumption characteristics and unit operation parameter comprises: the topological structure vector of Steam Turbine, the power equation of described fired power generating unit and the equation that recepts the caloric in the proper vector between the hot physical property state parameter of working medium, described fired power generating unit;

Obtain net coal consumption rate by the set of eigenvectors between described energy consumption characteristics and unit operation parameter, and monitor the performance of described fired power generating unit according to described net coal consumption rate;

Switching is carried out according to the performance of described fired power generating unit by switching device.

The monitoring method of above-mentioned Fossil-fired Unit Performance, wherein, described method also comprises: according to formula (1):

$b_{sn}=\frac{122.835}{{\mathrm{\η}}_b{\mathrm{\η}}_i{\mathrm{\η}}_m{\mathrm{\η}}_g{\mathrm{\η}}_p(1-\mathrm{\ξ})}---\left(1\right)$

Obtain described net coal consumption rate b _sn, wherein: η _bfor boiler efficiency, η _ifor thermal efficiency of cycle, η _mfor mechanical efficiency, η _gfor efficiency of generator, η _pfor pipeline efficiency, ξ is station service power consumption rate.

The monitoring method of above-mentioned Fossil-fired Unit Performance, wherein, described method comprises: according to formula (2):

${\mathrm{\η}}_i=\frac{N}{Q}---\left(2\right)$

Obtain thermal efficiency η _i, wherein N is the acting amount of fired power generating unit, and Q is the amount of heat absorption of fired power generating unit.

The monitoring method of above-mentioned Fossil-fired Unit Performance, wherein, described method also comprises: according to formula (3):

$h(\mathrm{\π},\mathrm{\τ})=RT\mathrm{\τ}(\underset{i=1}{\overset{9}{\Σ}}{n}_i^0{J}_i^0{\mathrm{\τ}}^{J_i^0-1}+\underset{i=1}{\overset{43}{\Σ}}{n}_i{\mathrm{\π}}^{I_i}{J}_i{\left(\mathrm{\τ}-0.5\right)}^{J_i-1})---\left(3\right)$

Proper vector between the hot physical property state parameter setting up described working medium, wherein, h is vapours enthalpy, reduced pressure π=p/p ^*, reduced temperature τ=T ^*/ T, p ^*, T ^*be respectively Characteristic pressures and characteristic temperature, n _i, I _iand J _ibe constant coefficient, R is gas law constant.

The monitoring method of above-mentioned Fossil-fired Unit Performance, wherein, according to power equation (4):

$N=h_0+\mathrm{\σ}-h_c-{\[{\mathrm{\α}}_i\]}^T\[{{\tilde{h}}_i}^{\mathrm{\σ}}\]-{\[{\mathrm{\α}}_{fi}\]}^T\[{\tilde{h}}_{fi}^{\mathrm{\σ}}\]---\left(4\right)$

Obtain the acting amount N of fired power generating unit;

Wherein: leave if drawn gas from high pressure cylinder: ${{\tilde{h}}_i}^{\mathrm{\σ}}=h_i+\mathrm{\σ}-h_c,{\tilde{h}}_{fi}^{\mathrm{\σ}}=h_{fi}+\mathrm{\σ}-h_c;$

If drawn gas, therefrom low pressure (LP) cylinder leaves: ${{\tilde{h}}_i}^{\mathrm{\σ}}=h_i-h_c,{\tilde{h}}_{fi}^{\mathrm{\σ}}=h_{fi}-h_c;$

H ₀for main steam enthalpy, h _cfor low pressure (LP) cylinder exhaust enthalpy, σ is the enthalpy liter in reheater, [α _i] be regenerative steam coefficient vector, for enthalpy drop of drawing gas, [α _fi] be auxiliary steam coefficient vector, for other Auxiliary Steam-water enthalpy drop, h _ifor the enthalpy that draws gas, h _fifor auxiliary steam enthalpy.

The monitoring method of above-mentioned Fossil-fired Unit Performance, wherein, described method also comprises: according to caloric receptivity equation (5):

$Q=h_0+\mathrm{\σ}-h_{fw}-{\[{\mathrm{\α}}_i\]}_c^T{\[\mathrm{\σ}\]}_c-{\[{\mathrm{\α}}_{fi}\]}_d^T{\[\mathrm{\σ}\]}_d+{\mathrm{\α}}_{rs}(h_r-h_{rs})+{\mathrm{\α}}_{ss}(h_0-h_{ss})+{\[{\mathrm{\α}}_{bi}\]}_m{{\[h_{bi}-h_{fw}\]}_m}^T---\left(5\right)$

Obtain amount of heat absorption Q; Wherein: h ₀for main steam enthalpy, σ is the enthalpy liter in reheater, h _fwfor feedwater enthalpy, [α _i] be regenerative steam coefficient vector, [α _fi] be auxiliary steam coefficient vector, α _ssfor than overheated spray water flux, h _ssfor overheated desuperheating water enthalpy, α _rsfor than reheating spray water flux, h _rsfor reheater desuperheating water enthalpy, h _rfor reheated steam enthalpy, h ₀for main steam enthalpy, summing target c is high pressure cylinder primary heater progression, and d is the number of the auxiliary steam flow leaving system from main inlet throttle-stop valve to reheating between cold section, α _bifor the medium-loss of boiler side, total m kind, its enthalpy is respectively h _bi;

Described medium-loss comprises: continuous blowdown amount, average or periodic blow down amount, average boiler soot-blowing amount.

The monitoring method of above-mentioned Fossil-fired Unit Performance, wherein, described method also comprises:

Regenerative steam coefficient vector is obtained according to Steam Turbine topological structure vector in described fired power generating unit; Described regenerative steam coefficient vector is the described fired power generating unit non-regulated amount of drawing gas of bleeding at different levels.

The monitoring method of above-mentioned Fossil-fired Unit Performance, wherein, substitutes into formula (6) by Steam Turbine topological structure vector in described fired power generating unit:

[α _i]＝f(p _i,T _i)＝([τ _i]-[A _f].[α _fi]-[A _τ].[α _τi]-[Δq])[A] ^-1(6)

Obtain described regenerative steam coefficient vector;

Described Steam Turbine topological structure vector is formula (7):

[A].[α _i]+[A _f].[α _fi]+[A _τ].[α _τi]+[Δq]＝[τ _i](7)

Wherein: [A], [A _f] and [A _τ] be respectively the structure vector relevant with auxiliary flow water unit structure with backheat unit in described fired power generating unit, auxiliary steam unit, UTILIZATION OF VESIDUAL HEAT IN unit, [α _i], [α _fi] and [α _{τ i}] be respectively regenerative steam coefficient vector, auxiliary steam coefficient vector and passed in and out the coefficient of flow matrix of bootstrap system by main feed line or condensate line, [Δ q] provides separately heat vector, [τ for supplemental heat vector or waste heat _i] be feed-water enthalpy rise vector.

The monitoring system of the Fossil-fired Unit Performance that the embodiment of the present invention provides and method, by increasing wireless acquisition device and adopt the set of eigenvectors set up in described fired power generating unit between energy consumption characteristics and unit operation parameter on hardware configuration in monitoring method, can for dissimilar unit, energy consumption assessment and the main heat economy performance Index Calculation of actual operating mode are done to the exhaust heat utilization effect of dissimilar unit, actual operating mode unit performance of main equipment index calculate, actual operating mode UTILIZATION OF VESIDUAL HEAT IN power consumption analysis, thus determine the effective utilization rate of waste heat of unit under different operating mode, rational arrangement runs and drops into and excision.

Accompanying drawing explanation

Accompanying drawing described herein is used to provide a further understanding of the present invention, forms a application's part, does not form limitation of the invention.In the accompanying drawings:

Fig. 1 is the schematic diagram that in prior art, a kind of degree of depth recovery boiler smoke exhaust heat improves the system of unit cycle efficieny;

Fig. 2 is the schematic diagram of a kind of bootstrap system in prior art;

Fig. 3 is the structural representation of the monitoring system of a kind of Fossil-fired Unit Performance in the embodiment of the present invention;

Fig. 4 is the structural representation of wireless acquisition device in the embodiment of the present invention;

Fig. 5 is the process flow diagram of the monitoring method of a kind of Fossil-fired Unit Performance in the embodiment of the present invention.

Embodiment

For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with accompanying drawing, the embodiment of the present invention is described in further detail.At this, schematic description and description of the present invention is for explaining the present invention, but not as a limitation of the invention.

The embodiment of the present invention provides a kind of monitoring system of Fossil-fired Unit Performance, and as shown in Figure 3, described monitoring system comprises:

Wireless acquisition device 301, treating apparatus 302 and switching device 303;

Described wireless acquisition device 301 connects fired power generating unit bootstrap system, for gathering the unit operation parameter of fired power generating unit bootstrap system; Described unit operation parameter comprises: drive vapor pressure, condensate water pressure, condensing water flow be sent to treating apparatus; Unit operation parameter will as subsequent analysis Fossil-fired Unit Performance, the especially foundation of the performance of fired power generating unit bootstrap system.

Described treating apparatus 302 processes described unit operation parameter and obtains the performance of described fired power generating unit;

Described switching device 303 connects described treating apparatus 302, for obtaining the performance of net coal consumption rate and described fired power generating unit after setting up the set of eigenvectors in described fired power generating unit between energy consumption characteristics and unit operation parameter.

At this, due in prior art in fired power generating unit bootstrap system the mode of image data generally adopt and manually read on the spot or build a large amount of data lines and interconnecting module gathers, the environment that the former mode counts installation site due to table in process of the test is more severe, therefore, the mode of artificial reading is on the spot relatively dangerous, be unfavorable for the collection of data, store and real-time online measuring, although the mode of the latter decreases manual operation amount and reading is relatively accurate, but be usually applied in more complicated site test, and owing to needing to arrange a large amount of cables and link block, add the hardware cost of this system.Therefore a kind of monitoring system of Fossil-fired Unit Performance that provides of the embodiment of the present invention, data are carried out in real time by adopting wireless acquisition device and gathers accurately, can for dissimilar unit, energy consumption assessment and the main heat economy performance Index Calculation of actual operating mode, actual operating mode unit performance of main equipment index calculate, actual operating mode UTILIZATION OF VESIDUAL HEAT IN power consumption analysis are done to the exhaust heat utilization effect of dissimilar unit, thus determine the effective utilization rate of waste heat of unit under different operating mode, reasonably arrange to run and drop into and excision.

In the present invention one preferred embodiment, provide the monitoring system of Fossil-fired Unit Performance, as shown in Figure 4, described wireless acquisition device also comprises:

Transmitter 401, for gathering described unit operation parameter and being sent to terminal groove 402; Preferably, transmitter can be pressure unit.

Terminal groove 402, connects transmitter 401 and measuring resistance 403, for changing the mode of operation signal of described wireless acquisition device in gatherer process; Preferably, terminal groove such as can be four mouthfuls of terminal grooves (1,2,3,4), makes wireless acquisition device of the present invention can gather the signal of multiple-working mode by the different short circuit modes of terminal groove.

Measuring resistance 403, for converting the current signal of described unit operation parameter to voltage signal; Concrete, because the unit operation parameter collected is current signal, for the ease of transmission and the process of follow-up signal, first current signal can be converted to voltage signal herein and then be transferred to voltage measurement parts and carry out the measurement of magnitude of voltage.Preferably, measuring resistance such as can be the measuring resistance of 250 ohm, conveniently changes signal.

Voltage measurement parts 404, are connected with described measuring resistance 403, for measuring the magnitude of voltage of described voltage signal; In specific implementation process, voltage measurement parts such as can be A D converter.

Central processing unit 405, is connected with described voltage measurement parts, for the unit operation parameter of described voltage signal is added markers, and dissimilar unit operation parameter is stored respectively; Because unit operation parameter has multiple different classification, need to carry out its corresponding computing, therefore store respectively, follow-up convenient extraction.

Wireless transmission component 406, is connected with described central processing unit, gives described treating apparatus for the Signal transmissions that exported by central processing unit.Adopt wireless transmission component to communicate with central processing unit, can human and material resources be saved, simplify hardware facility of the present invention.

The monitoring system of the Fossil-fired Unit Performance that the embodiment of the present invention provides, preferably, described central processing unit 405 also processes according to different ranges for the magnitude of voltage of the unit operation parameter measured by described voltage measurement parts, the voltage data that final output is corresponding with described unit operation parameter.Range due to pressure unit is different, mainly contains 24MPa, 5.5MPa, 1MPa, 200kPa, 160kPa etc., therefore needs central processing unit to screen respectively according to different ranges, and obtains correct pressure signal.

Preferably, the monitoring system of the Fossil-fired Unit Performance that the embodiment of the present invention provides, wherein wireless acquisition device also comprises outer power supply source 407, is connected with described terminal groove 402 and described measuring resistance 403, for providing stable power supply to described wireless acquisition device.When concrete enforcement, outer power supply source such as can be the dry cell of 2 joint 9V.So, the loop that comprises pressure unit is just formed.

The monitoring system of the Fossil-fired Unit Performance that the embodiment of the present invention provides, wherein wireless acquisition device also comprises working power 408, being connected, inputting for providing power supply with described central processing unit 405.Working power realizes by the dry cell of 2 joint 4V.

Preferably, wireless acquisition device also comprises: display screen 409, is connected with described central processing unit 405, for providing the Presentation Function of human-computer interaction interface.

Preferably, wireless acquisition device also comprises: button groups 410, is connected, provides the input function of human-computer interaction interface with described central processing unit 405.

In another preferred embodiment, wireless acquisition device also comprises clock chip 411, is connected, for providing the standard time to wireless acquisition device with described central processing unit 405.

In the implementation process that the wireless acquisition device provided in the embodiment of the present invention is concrete, the central processing unit in wireless acquisition device can adopt MSP430F247 chip.

The wireless acquisition device that the embodiment of the present invention provides is applied in the monitoring system of Fossil-fired Unit Performance, and the numerical value that gauge outfit numerical value and wireless acquisition device receive compares, numerical difference ten thousand/in, there is measurement performance more accurately.Application result shows: the wireless acquisition device that the embodiment of the present invention provides has stronger applicability and stability.

The embodiment of the present invention also provides a kind of monitoring method of Fossil-fired Unit Performance, and as shown in Figure 5, described method comprises:

Step 501, gathers the unit operation parameter of fired power generating unit bootstrap system by wireless acquisition device; Described unit operation parameter comprises: drive vapor pressure, condensate water pressure, condensing water flow; Unit operation parameter will as subsequent analysis Fossil-fired Unit Performance, the especially foundation of the performance of fired power generating unit bootstrap system.

Step 502, sets up the set of eigenvectors between energy consumption characteristics and unit operation parameter in described fired power generating unit; Set of eigenvectors between described energy consumption characteristics and unit operation parameter comprises: the topological structure vector of Steam Turbine, the power equation of described fired power generating unit and the equation that recepts the caloric in the proper vector between the hot physical property state parameter of working medium, described fired power generating unit;

The energy consumption characteristics of unit is determined by the topological structure of therrmodynamic system, service condition and the method for operation, and above condition can be described as the boundary condition of unit operation.When above-mentioned condition is given, then the state parameter (as pressure, temperature, flow etc.) at each position of therrmodynamic system is also just determined, the energy consumption characteristics of corresponding unit is also determined.Therefore, the therrmodynamic system of unit state at a time can be described as a certain state point determined in n dimension state space Ω.

Step 503, obtains net coal consumption rate by the set of eigenvectors between described energy consumption characteristics and unit operation parameter, monitors the performance of described fired power generating unit according to described net coal consumption rate;

Step 504, carries out switching by switching device according to the performance of described fired power generating unit.

The monitoring method of the Fossil-fired Unit Performance that the embodiment of the present invention provides, by wireless acquisition device data carried out in real time and gather accurately, can for dissimilar unit, energy consumption assessment and the main heat economy performance Index Calculation of actual operating mode, actual operating mode unit performance of main equipment index calculate, actual operating mode UTILIZATION OF VESIDUAL HEAT IN power consumption analysis are done to the exhaust heat utilization effect of dissimilar unit, thus determine the effective utilization rate of waste heat of unit under different operating mode, reasonably arrange to run and drop into and excision.

The embodiment of the present invention also provides a kind of monitoring method of Fossil-fired Unit Performance, and preferably, described method also comprises: according to formula (1):

$b_{sn}=\frac{122.835}{{\mathrm{\η}}_b{\mathrm{\η}}_i{\mathrm{\η}}_m{\mathrm{\η}}_g{\mathrm{\η}}_p(1-\mathrm{\ξ})}---\left(1\right)$

Obtain described net coal consumption rate b _sn, wherein: η _bfor boiler efficiency, η _ifor thermal efficiency of cycle, η _mfor mechanical efficiency, η _gfor efficiency of generator, η _pfor pipeline efficiency, ξ is station service power consumption rate.Concrete, net coal consumption rate b _snthe most basic energy consumption characteristics index of fired power generating unit, by the net coal consumption rate b calculated _sn, just reasonably can arrange to run and drop into and excision, realize object of the present invention.

The embodiment of the present invention also provides a kind of monitoring method of Fossil-fired Unit Performance, and preferably, described method comprises: according to formula (2):

${\mathrm{\η}}_i=\frac{N}{Q}---\left(2\right)$

Obtain thermal efficiency η _i, the thermal efficiency is the ratio of system acting amount and Systemic absorption heat, and wherein N is the acting amount of fired power generating unit, and Q is the amount of heat absorption of fired power generating unit.The thermal efficiency is brought in formula (1), ask for the net coal consumption rate b under current working _sn.

The embodiment of the present invention also provides a kind of monitoring method of Fossil-fired Unit Performance, and preferably, described method also comprises: according to formula (3):

$h(\mathrm{\π},\mathrm{\τ})=RT\mathrm{\τ}(\underset{i=1}{\overset{9}{\Σ}}{n}_i^0{J}_i^0{\mathrm{\τ}}^{J_i^0-1}+\underset{i=1}{\overset{43}{\Σ}}{n}_i{\mathrm{\π}}^{I_i}{J}_i{\left(\mathrm{\τ}-0.5\right)}^{J_i-1})---\left(3\right)$

Proper vector between the hot physical property state parameter setting up described working medium, wherein, h is vapours enthalpy, reduced pressure π=p/p ^*, reduced temperature τ=T ^*/ T, p ^*, T ^*be respectively Characteristic pressures and characteristic temperature, n _i, I _iand J _ibe constant coefficient, R is gas law constant.Preferably, the proper vector between the hot physical property state parameter of working medium provides the algorithm model of the various enthalpies asked in fired power generating unit.

The embodiment of the present invention also provides a kind of monitoring method of Fossil-fired Unit Performance, preferably, according to power equation (4):

$N=h_0+\mathrm{\σ}-h_c-{\[{\mathrm{\α}}_i\]}^T\[{{\tilde{h}}_i}^{\mathrm{\σ}}\]-{\[{\mathrm{\α}}_{fi}\]}^T\[{\tilde{h}}_{fi}^{\mathrm{\σ}}\]---\left(4\right)$

Obtain the acting amount N of fired power generating unit;

Wherein: leave if drawn gas from high pressure cylinder: ${{\tilde{h}}_i}^{\mathrm{\σ}}=h_i+\mathrm{\σ}-h_c,{\tilde{h}}_{fi}^{\mathrm{\σ}}=h_{fi}+\mathrm{\σ}-h_c;$

If drawn gas, therefrom low pressure (LP) cylinder leaves: ${{\tilde{h}}_i}^{\mathrm{\σ}}=h_i-h_c,{\tilde{h}}_{fi}^{\mathrm{\σ}}=h_{fi}-h_c;$

H ₀for main steam enthalpy, h _cfor low pressure (LP) cylinder exhaust enthalpy, σ is the enthalpy liter in reheater, [α _i] be regenerative steam coefficient vector, for enthalpy drop of drawing gas, [α _fi] be auxiliary steam coefficient vector, for other Auxiliary Steam-water enthalpy drop, h _ifor the enthalpy that draws gas, h _fifor auxiliary steam enthalpy.Preferably, enthalpy can be asked for by the proper vector between the hot physical property state parameter of working medium.

The embodiment of the present invention also provides a kind of monitoring method of Fossil-fired Unit Performance, and preferably, described method also comprises: according to caloric receptivity equation (5):

$Q=h_0+\mathrm{\σ}-h_{fw}-{\[{\mathrm{\α}}_i\]}_c^T{\[\mathrm{\σ}\]}_c-{\[{\mathrm{\α}}_{fi}\]}_d^T{\[\mathrm{\σ}\]}_d+{\mathrm{\α}}_{rs}(h_r-h_{rs})+{\mathrm{\α}}_{ss}(h_0-h_{ss})+{\[{\mathrm{\α}}_{bi}\]}_m{{\[h_{bi}-h_{fw}\]}_m}^T---\left(5\right)$

Obtain amount of heat absorption Q; Wherein: h ₀for main steam enthalpy, σ is the enthalpy liter in reheater, h _fwfor feedwater enthalpy, [α _i] be regenerative steam coefficient vector, [α _fi] be auxiliary steam coefficient vector, α _ssfor than overheated spray water flux, h _ssfor overheated desuperheating water enthalpy, α _rsfor than reheating spray water flux, h _rsfor reheater desuperheating water enthalpy, h _rfor reheated steam enthalpy, h ₀for main steam enthalpy, summing target c is high pressure cylinder primary heater progression, and d is the number of the auxiliary steam flow leaving system from main inlet throttle-stop valve to reheating between cold section, α _bifor the medium-loss of boiler side, total m kind, its enthalpy is respectively h _bi;

Described medium-loss comprises: continuous blowdown amount, average or periodic blow down amount, average boiler soot-blowing amount.

Preferably, ask for the acting amount of fired power generating unit by formula (4) in the embodiment of the present invention and obtained the absorption heat of fired power generating unit by formula (5), bring in formula (2), namely formula (2) is deformed into:

${\mathrm{\η}}_i=\frac{N}{Q}=\frac{h_0+\mathrm{\σ}-h_c-{\[{\mathrm{\α}}_i\]}^T\[{{\tilde{h}}_i}^{\mathrm{\σ}}\]-{\[{\mathrm{\α}}_{fi}\]}^T\[{\tilde{h}}_{fi}^{\mathrm{\σ}})}{h_0+\mathrm{\σ}-h_{fw}-{\[{\mathrm{\α}}_i\]}_c^T{\[\mathrm{\σ}\]}_c-{\[{\mathrm{\α}}_{fi}\]}_d^T{\[\mathrm{\σ}\]}_d+{\mathrm{\α}}_{rs}(h_r-h_{rs})+{\mathrm{\α}}_{ss}(h_0-h_{ss})+{\[{\mathrm{\α}}_{bi}\]}_m{{\[h_{bi}-h_{fw}\]}_m}^T}$

The embodiment of the present invention also provides a kind of monitoring method of Fossil-fired Unit Performance, and preferably, described method also comprises:

Regenerative steam coefficient vector is obtained according to Steam Turbine topological structure vector in described fired power generating unit; Described regenerative steam coefficient vector is the described fired power generating unit non-regulated amount of drawing gas of bleeding at different levels.Concrete, in fired power generating unit, Steam Turbine has multistage bleeding.

The embodiment of the present invention also provides a kind of monitoring method of Fossil-fired Unit Performance, preferably, Steam Turbine topological structure vector in described fired power generating unit is substituted into formula (6):

[a _i]＝f(p _i,T _i)＝([τ _i]-[A _f].[α _fi]-[A _τ].[α _τi]-[Δq])[A] ^-1(6)

Obtain described regenerative steam coefficient vector;

Described Steam Turbine topological structure vector is formula (7):

[A].[α _i]+[A _f].[α _fi]+[A _τ].[α _τi]+[Δq]＝[τ _i](7)

Wherein: [A], [A _f] and [A _τ] be respectively the structure vector relevant with auxiliary flow water unit structure with backheat unit in described fired power generating unit, auxiliary steam unit, UTILIZATION OF VESIDUAL HEAT IN unit, [α _i], [α _fi] and [α _{τ i}] be respectively regenerative steam coefficient vector, auxiliary steam coefficient vector and passed in and out the coefficient of flow matrix of bootstrap system by main feed line or condensate line, [Δ q] provides separately heat vector, [τ for supplemental heat vector or waste heat _i] be feed-water enthalpy rise vector.By formula (7), formula (6) is carried out iteration, just can calculate regenerative steam coefficient vector [α _i], i.e. the non-regulated amount of drawing gas at different levels.

The monitoring system of the Fossil-fired Unit Performance that the embodiment of the present invention provides and method, by setting up the set of eigenvectors of therrmodynamic system, between the system status parameters making the desired value of system have a unique solution, the vector set of corresponding relation, characterizes the thermodynamic state of unit.Thus calculate the non-regulated amount of drawing gas, and then obtain the heat-economy figure of unit, the i.e. performance of described fired power generating unit, on the topological structure making analysis be based upon system and thermodynamic state parameter, partial Quantitative Analysis for therrmodynamic system has established unified unification analysis means, and in the analytic process that made it depart from, each step all emphasizes thermally equilibrated thought.Set of eigenvectors structure is comparatively easy, and highly versatile, is convenient to analyze multiple UTILIZATION OF VESIDUAL HEAT IN mode to the impact of fired power generating unit therrmodynamic system.

Above-described embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only the specific embodiment of the present invention; the protection domain be not intended to limit the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (8)

1. a monitoring system for Fossil-fired Unit Performance, is characterized in that, described monitoring system comprises:

Wireless acquisition device, treating apparatus and switching device;

Described wireless acquisition device connects fired power generating unit bootstrap system, for gathering the unit operation parameter of fired power generating unit bootstrap system; Described unit operation parameter comprises: drive vapor pressure, condensate water pressure, condensing water flow be sent to treating apparatus;

Described treating apparatus obtains the performance of net coal consumption rate and described fired power generating unit after setting up the set of eigenvectors in described fired power generating unit between energy consumption characteristics and unit operation parameter;

Described switching device connects described treating apparatus, and the performance for the described fired power generating unit obtained according to described treating apparatus carries out switching,

Wherein, according to formula (1):

$b_{sn}=\frac{122.835}{{\mathrm{\η}}_b{\mathrm{\η}}_i{\mathrm{\η}}_m{\mathrm{\η}}_g{\mathrm{\η}}_p(1-\mathrm{\ξ})}---\left(1\right)$

Obtain described net coal consumption rate b _sn, wherein: η _bfor boiler efficiency, η _ifor thermal efficiency of cycle, η _mfor mechanical efficiency, η _gfor efficiency of generator, η _pfor pipeline efficiency, ξ is station service power consumption rate;

According to formula (2):

${\mathrm{\η}}_i=\frac{N}{Q}---\left(2\right)$

Obtain thermal efficiency of cycle η _i, wherein N is the acting amount of fired power generating unit, and Q is the amount of heat absorption of fired power generating unit;

According to caloric receptivity equation (5):

$Q=h_0+\mathrm{\σ}-h_{fw}-{\[{\mathrm{\α}}_i\]}_c^T{\[\mathrm{\α}\]}_c-{\[{\mathrm{\α}}_{fi}\]}_d^T{\[\mathrm{\α}\]}_d+{\mathrm{\α}}_{rs}(h_r-h_{rs})+{\mathrm{\α}}_{ss}(h_0-h_{ss})+{\[{\mathrm{\α}}_{bi}\]}_m{{\[h_{bi}-h_{fw}\]}_m}^T---\left(5\right)$

Obtain amount of heat absorption Q; Wherein: h ₀for main steam enthalpy, σ is the enthalpy liter in reheater, h _fwfor feedwater enthalpy, [α _i] be regenerative steam coefficient vector, [α _fi] be auxiliary steam coefficient vector, α _ssfor than overheated spray water flux, h _ssfor overheated desuperheating water enthalpy, α _rsfor than reheating spray water flux, h _rsfor reheater desuperheating water enthalpy, h _rfor reheated steam enthalpy, h ₀for main steam enthalpy, summing target c is high pressure cylinder primary heater progression, and d is the number of the auxiliary steam flow leaving system from main inlet throttle-stop valve to reheating between cold section, α _bifor the medium-loss of boiler side, total m kind, its enthalpy is respectively h _bi;

Described medium-loss comprises: continuous blowdown amount, average or periodic blow down amount, average boiler soot-blowing amount.

2. the monitoring system of Fossil-fired Unit Performance according to claim 1, is characterized in that, described wireless acquisition device also comprises:

Transmitter, for gathering described unit operation parameter and being sent to terminal groove;

Terminal groove, connects transmitter and measuring resistance, for changing the mode of operation signal of described wireless acquisition device in gatherer process;

Measuring resistance, for converting the current signal of described unit operation parameter to voltage signal;

Voltage measurement parts, are connected with described measuring resistance, for measuring the magnitude of voltage of described voltage signal;

Central processing unit, is connected with described voltage measurement parts, for the unit operation parameter of described voltage signal is added markers, and dissimilar unit operation parameter is stored respectively;

Wireless transmission component, is connected with described central processing unit, gives described treating apparatus for the Signal transmissions that exported by central processing unit.

3. the monitoring system of Fossil-fired Unit Performance according to claim 2, it is characterized in that, described central processing unit also processes according to different ranges for the magnitude of voltage of the unit operation parameter measured by described voltage measurement parts, the voltage data that final output is corresponding with described unit operation parameter.

4. a monitoring method for Fossil-fired Unit Performance, is characterized in that, described method comprises:

The unit operation parameter of fired power generating unit bootstrap system is gathered by wireless acquisition device; Described unit operation parameter comprises: drive vapor pressure, condensate water pressure, condensing water flow;

Set up the set of eigenvectors between energy consumption characteristics and unit operation parameter in described fired power generating unit; Set of eigenvectors between described energy consumption characteristics and unit operation parameter comprises: Steam Turbine topological structure vector, the power equation of described fired power generating unit and the equation that recepts the caloric in the proper vector between the hot physical property state parameter of working medium, fired power generating unit;

Obtain net coal consumption rate by the set of eigenvectors between described energy consumption characteristics and unit operation parameter, and monitor the performance of described fired power generating unit according to described net coal consumption rate;

Switching is carried out according to the performance of described fired power generating unit by switching device;

Wherein, according to formula (1):

$b_{sn}=\frac{122.835}{{\mathrm{\η}}_b{\mathrm{\η}}_i{\mathrm{\η}}_m{\mathrm{\η}}_g{\mathrm{\η}}_p(1-\mathrm{\ξ})}---\left(1\right)$

Obtain described net coal consumption rate b _sn, wherein: η _bfor boiler efficiency, η _ifor thermal efficiency of cycle, η _mfor mechanical efficiency, η _gfor efficiency of generator, η _pfor pipeline efficiency, ξ is station service power consumption rate;

According to formula (2):

${\mathrm{\η}}_i=\frac{N}{Q}---\left(2\right)$

Obtain thermal efficiency of cycle η _i, wherein N is the acting amount of fired power generating unit, and Q is the amount of heat absorption of fired power generating unit;

According to caloric receptivity equation (5):

$Q=h_0+\mathrm{\σ}-h_{fw}-{\[{\mathrm{\α}}_i\]}_c^T{\[\mathrm{\σ}\]}_c-{\[{\mathrm{\α}}_{fi}\]}_d^T{\[\mathrm{\σ}\]}_d+{\mathrm{\α}}_{rs}(h_r-h_{rs})+{\mathrm{\α}}_{ss}(h_0-h_{ss})+{\[{\mathrm{\α}}_{bi}\]}_m{{\[h_{bi}-h_{fw}\]}_m}^T---\left(5\right)$

Obtain amount of heat absorption Q; Wherein: h ₀for main steam enthalpy, σ is the enthalpy liter in reheater, h _fwfor feedwater enthalpy, [α _i] be regenerative steam coefficient vector, [α _fi] be auxiliary steam coefficient vector, α _ssfor than overheated spray water flux, h _ssfor overheated desuperheating water enthalpy, α _rsfor than reheating spray water flux, h _rsfor reheater desuperheating water enthalpy, h _rfor reheated steam enthalpy, h ₀for main steam enthalpy, summing target c is high pressure cylinder primary heater progression, and d is the number of the auxiliary steam flow leaving system from main inlet throttle-stop valve to reheating between cold section, α _bifor the medium-loss of boiler side, total m kind, its enthalpy is respectively h _bi;

Described medium-loss comprises: continuous blowdown amount, average or periodic blow down amount, average boiler soot-blowing amount.

5. the monitoring method of a kind of Fossil-fired Unit Performance according to claim 4, is characterized in that, described method also comprises: according to formula (3):

$h(\mathrm{\π},\mathrm{\τ})=RT\mathrm{\τ}(\underset{i=1}{\overset{9}{\mathrm{\Σ}}}{n}_i^0{J}_i^0{\mathrm{\τ}}^{J_i^0-1}+\underset{i=1}{\overset{43}{\mathrm{\Σ}}}{n}_i{\mathrm{\π}}^{I_i}{J}_i{\left(\mathrm{\τ}-0.5\right)}^{J_i-1})---\left(3\right)$

Proper vector between the hot physical property state parameter setting up described working medium, wherein, h is vapours enthalpy, reduced pressure π=p/p ^*, reduced temperature τ=T ^*/ T, p ^*, T ^*be respectively Characteristic pressures and characteristic temperature, n _i, I _iand J _ibe constant coefficient, R is gas law constant.

6. the monitoring method of a kind of Fossil-fired Unit Performance according to claim 4, is characterized in that, according to power equation (4):

$N=h_0+\mathrm{\σ}-h_c-{\[{\mathrm{\α}}_i\]}^T\[{{\tilde{h}}_i}^{\mathrm{\σ}}\]-{\[{\mathrm{\α}}_{fi}\]}^T\[{\tilde{h}}_{fi}^{\mathrm{\σ}}\]---\left(4\right)$

Obtain the acting amount N of fired power generating unit;

Wherein: leave if drawn gas from high pressure cylinder: ${{\tilde{h}}_i}^{\mathrm{\σ}}=h_i+\mathrm{\σ}-h_c,{\tilde{h}}_{fi}^{\mathrm{\σ}}=h_{fi}+\mathrm{\σ}-h_c;$

If drawn gas, therefrom low pressure (LP) cylinder leaves: ${{\tilde{h}}_i}^{\mathrm{\σ}}=h_i-h_c,{\tilde{h}}_{fi}^{\mathrm{\σ}}=h_{fi}-h_c;$

H ₀for main steam enthalpy, h _cfor low pressure (LP) cylinder exhaust enthalpy, σ is the enthalpy liter in reheater, [α _i] be regenerative steam coefficient vector, for enthalpy drop of drawing gas, [α _fi] be auxiliary steam coefficient vector, for other Auxiliary Steam-water enthalpy drop, h _ifor the enthalpy that draws gas, h _fifor auxiliary steam enthalpy.

7. the monitoring method of a kind of Fossil-fired Unit Performance according to claim 4, is characterized in that, described method also comprises:

Regenerative steam coefficient vector is obtained according to Steam Turbine topological structure vector in described fired power generating unit; Described regenerative steam coefficient vector is the described fired power generating unit non-regulated amount of drawing gas of bleeding at different levels.

8. the monitoring method of a kind of Fossil-fired Unit Performance according to claim 7, is characterized in that,

Steam Turbine topological structure vector in described fired power generating unit is substituted into formula (6):

[α _i]＝f(p _i,T _i)＝([τ _i]-[A _f].[α _fi]-[A _τ].[α _τi]-[Δq])[A] ^-1(6)

Obtain described regenerative steam coefficient vector;

Described Steam Turbine topological structure vector is formula (7):

[A].[α _i]+[A _f].[α _fi]+[A _τ].[α _τi]+[Δq]＝[τ _i](7)

Wherein: [A], [A _f] and [A _τ] be respectively the structure vector relevant with auxiliary flow water unit structure with backheat unit in described fired power generating unit, auxiliary steam unit, UTILIZATION OF VESIDUAL HEAT IN unit, [α _i], [α _fi] and [α _{τ i}] be respectively regenerative steam coefficient vector, auxiliary steam coefficient vector and passed in and out the coefficient of flow matrix of bootstrap system by main feed line or condensate line, [Δ q] provides separately heat vector, [τ for supplemental heat vector or waste heat _i] be feed-water enthalpy rise vector.